The McCormick 6633741A1 is a genuine OEM sealing ring, also known as an oil seal, designed for critical applications in agricultural machinery. This precision-engineered component prevents lubricant leakage and protects internal parts from contaminants. With an inner diameter of 40 mm, an outer diameter of 55 mm, and a thickness of 8 mm, it provides a secure and durable seal for various McCormick, Case IH, and New Holland models.